I promised to send a statement of the proposal that emerged on output
ops at the last telcon.
The proposal is:
1) Keep output operations in the spec.
2) Publish the TCP binding as a note motivating the need to retain
output operations.
3) Add a non-normative reference to this note from the spec.
4) State that the HTTP binding simply does not support output
operations. Arthur has an action to investigate what it would mean to
support output ops in the HTTP binding, which may lead to a proposal or
issues, or both.